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# Lesson 2.2 (Days 1, 2, 3, & 4)

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Author: Melinda Hollan
##### Description:

Day 1 Introduction to Functions

Day 2 Piecewise Functions

Day 3 Difference Quotient

Day 4 Linear Regression

(more)

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Tutorial

## 2.2 Day 1 Introduction to Functions

How do you tell if you have a function or not? We will discuss ways to tell from mapping diagrams, ordered pairs (t-charts), equations, and graphs. Also we will evaluate some functions!

## 2.2 Day 2 Piecewise Functions

This video will show you how to evaluate and to graph functions that involve 2 or more equations with a specified domain.

## 2.2 Day 3 Difference Quotient

You will be introduced to the Difference Quotient which is also used in calculus.

## 2.2 Day 4 Linear Regression

We can make predictions about the future! You will be writing equations based on a set of data and then use them to predict what might happen based on the trend.